Last Updated:2025/11/20

A concave surface or curve. / The vault of the sky. / One of the celestial spheres of the Ptolemaic or geocentric model of the world.

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concave

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Source Word

concave

IPA(Pronunciation)
Noun
Japanese Meaning
凹面または凹状の曲線。 / 天空の天蓋。 / プトレマイオス体系や地心説における天体の一つの円盤(天球)。
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plural

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